Errcode Dll-2

[Papaj]

Wife is attempting to Log in and receiving this error on character screen *Errcode Dll-2*. She was playing just fine a few days ago, she thought she had a virus pop up about dll setup and McAfee removed it from computer. I tried to redownload the patch notes and the computer continued to remove the file. I then just to see tried a back up and restore point and that allowed her to play, however when her computer did an update she was missing the file ONCE AGAIN. I redownloaded the patch again and now receiving the errcode Dll-2... How do I fix this??